> I have some troubles implementing a parametrized interface of Timers.
I
> have used the code snippets from "Software design Patterns for Tinyos"
> from Gay et al. and some hints online and from this mailing list. I am
> attaching the complete code (it is basically the Blink application
with
> an array of 3 timers). When compiling, the error is:
>
> In component `BlinkC':
> BlinkC.nc: In function `Boot.booted':
> BlinkC.nc:51: Timers.startPeriodic not connected
> BlinkC.nc:52: Timers.startPeriodic not connected
> BlinkC.nc:53: Timers.startPeriodic not connected
> make: *** [exe0] Error 1
>
> I found a hint on this mailing list from Phil Lewis that I need a
> default implementation for the event, but this hint leads to yet
> another compilation error, saying:
>
> In file included from BlinkAppC.nc:45:
> In component `BlinkC':
> BlinkC.nc:61: `fired' is defined, not used, in this component
> BlinkC.nc:61: (default implementations are only for used commands or
> events)
> BlinkC.nc:61: conflicting types for `Timers.fired'
> BlinkC.nc:56: previous declaration of `Timers.fired'
> make: *** [exe0] Error 1
You're close - you don't need a default implementation for the event,
but for the startPeriodic command, because the compiler can't or doesn't
check you won't call startPeriodic() on a timer number that you didn't
connect (since you only wire up 0, 1 and 2, and you might call
Timers.startPeriodic[42] somewhere).
If you add:
default command void Timers.startPeriodic[uint8_t id](uint32_t
dt) {}
to BlinkC, it should work.
HTH,
Michiel
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